package com.gw.yunke.interceptor;


import org.springframework.stereotype.Component;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 
 * 跨域过滤器,测试联调时使用，线上采用nginx配置跨域
 * 
 * @author wanping
 * @version
 * @since 2016年6月19日
 */
@Component
public class CorsFilter implements Filter {

  final static org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(CorsFilter.class);

  public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
      throws IOException, ServletException {
    HttpServletRequest request = (HttpServletRequest) req;
    HttpServletResponse response = (HttpServletResponse) res;
    response.setHeader("Access-Control-Allow-Origin", request.getHeader("Origin"));
    response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
    response.setHeader("Access-Control-Max-Age", "3600");
    response.setHeader("Access-Control-Allow-Headers", "Accept,Authorization,Cache-Control,Content-Type,DNT,If-Modified-Since,Keep-Alive,Origin,User-Agent,X-Requested-With,GUAZISSO");
    response.setHeader("Access-Control-Allow-Credentials","true");
    logger.info("*********************************过滤器CorsFilter被使用**************************");
    chain.doFilter(req, res);
  }

  public void init(FilterConfig filterConfig) {}

  public void destroy() {}
}

